展平javascript对象数组

Question

我有一个具有层次结构的对象数组,如下所示:

[
    {name: 'ParentOne', children: [
        {name: 'ParentOneChildOne'},
        {name: 'ParentOneChildTwo', children: [
            {name: 'ParentOneChildTwoGrandChildOne'},
        ]},
    ]}, 
    {name: 'ParentTwo', children: [
        {name: 'ParentTwoChildOne', children: [
           {name: 'ParentTwoChildOneGrandChildOne'},
           {name: 'ParentTwoChildOneGrandChildTwo'}
        ]},
        {name: 'ParentTwoChildTwo'}
    ]}
];

我想压扁它:

[
    {name: 'ParentOne'},
    {name: 'ParentOneChildOne'},
    {name: 'ParentOneChildTwo'},
    {name: 'ParentOneChildTwoGrandChildOne'},
    {name: 'ParentTwo'},
    {name: 'ParentTwoChildOne'},
    {name: 'ParentTwoChildOneGrandChildOne'},
    {name: 'ParentTwoChildOneGrandChildTwo'},
    {name: 'ParentTwoChildTwo'}
]

我曾尝试_.flatten()和_.flatMap(),但不会产生什么,我需要.最好的方法是使用lodash.js或underscore.js来实现它.

Answer 1

不需要下划线/ lodash.

const arr = [
    {name: 'ParentOne', children: [
        {name: 'ParentOneChildOne'},
        {name: 'ParentOneChildTwo', children: [
            {name: 'ParentOneChildTwoGrandChildOne'},
        ]},
    ]}, 
    {name: 'ParentTwo', children: [
        {name: 'ParentTwoChildOne', children: [
           {name: 'ParentTwoChildOneGrandChildOne'},
           {name: 'ParentTwoChildOneGrandChildTwo'}
        ]},
        {name: 'ParentTwoChildTwo'}
    ]}
];

function flatten(arr) {
    return arr? arr.reduce((result, item) => [
        ...result,
        { name: item.name },
        ...flatten(item.children)
    ], []) : [];
}

console.log(flatten(arr));